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High Peak Density for Enhanced Coating Adhesion

The Importance of Peak Density in Coating Applications

The effectiveness of a coating system depends on the profile of the prepared surface. Peak density—the number of peaks per unit area—is a key factor that determines the adhesion strength of a coating. Higher peak density provides greater surface area for coatings to bond, improving adhesion and reducing the likelihood of coating failure.

Slag Abrasives: Challenges with Inconsistent Profiles

Blasting with slag abrasives often results in low peak density due to their irregular particle shapes and inconsistent performance. This creates several challenges:

  • Inconsistent Surface Profile: Variability in profile leads to uneven coating thickness.
  • Thicker Primer Coats: More material is required to cover the surface, increasing costs and labor.
  • Risk of Delamination: Thick primer layers are prone to delamination, particularly in harsh environments.

Peak Density When Using Slag

Results of using slag for abrasive blasting showcasing inconsistent surface profile and low peak density
Peak Density - Slag 2

GMA Garnet™: Delivering High Peak Density

GMA Garnet™ abrasives provide a consistent surface profile with high peak density, offering significant benefits:

  • Uniform Adhesion: Consistent profiles allow primers to be applied within specified thickness ranges.
  • Optimized Coating Performance: Higher peak density improves bonding strength, reducing the risk of coating delamination.
  • Efficient Material Use: With a smoother, more uniform surface, less coating material is required, saving costs and reducing waste.
These advantages make GMA Garnet™ a preferred choice for industries where long-term coating performance is critical.